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The Scientific Method
Transcript of The Scientific Method
Fleming transferred the mold to a liquid broth solution. This solution contained all the material the mold needed to grow. Fleming thought that the mold must be producing a chemical that killed the bacteria. Science is a tool.
How do I know if my idea is correct?
I test it! Identify the scientific method throughout Sir Alexander Fleming’s process.
What was his observation?
Which question did he ask himself?
What hypothesis did he form?
What was his experiment?
Which results did he evaluate? Applying the method. Needs to be answered to satisfy human curiosity about the observation.
Answerable and lead to the formation of a hypothesis about the problem. Question Observe phenomenon, event or “problem”.
Discovery may occur due to interest on the observer’s part, a suggestion or assignment, or a problem one wishes to resolve. Observation Observation
Defining question or problem
Research (planning, evaluating current evidence)
Forming a Hypothesis
Prediction from the hypothesis (deductive reasoning)
Experimentation (testing the hypothesis)
Evaluation and analysis (data)
Peer review and evaluation
Publication Different formats, all cover steps that can be applied to most experimental sciences (physics, chemistry).
May include some or all of the following in one form or another: The Scientific Method Sticks to certain accepted “rules of reasoning”.
Used to minimize mistakes.
Helps understand science. The Scientific Method Good science is based on information that can be measured or seen and verified by other scientists. It is a methodical approach to studying the natural world.
It asks basic questions :
How does the world work?
How did the world come to be?
What was the world like in the past, what is it like now, and what will it be like in the future?
Answered using observation, testing, and interpretation. What is science? “The most incomprehensible thing about the world is that it is comprehensible.”
-Albert Einstein Q.B. Claudia Gabriela Rochín Camacho THE SCIENTIFIC METHOD Geologists: Earth is their lab, it is not a controlled environment .
Astronomists: Most discoveries based on circumstantial evidence and observation with increasingly more powerful and varied telescopes. Think outside the box! An experiment is designed to prove or disprove the hypothesis.
Testing and experimentation can occur in the laboratory, in the field, on the blackboard, or the computer. Once the hypothesis has been established, it is time to test it.
Prediction: If the hypothesis is true, the ___(1)___ should happen when ___(2)__ is manipulated.
(1) Dependent variable (depends on what you are doing in the second blank)
(2) Independent variable (you manipulate it to get a reaction. Experiment An educated guess regarding the question’s answer.
Educated because the problem needs to be researched before forming a hypothesis.
It will be formed to answer a question.
Can be tested. Hypothesis A clear area existed around the mold because all the bacteria that had grown in this area died. In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. In real life Analyze data to make sure bias or inadequate effort did not lead to incorrect conclusions.
Always made public (print or at scientific meetings).
Subject to modification. Evaluation Staphylococcus Staphylococcus + Mold
After the mold grew, he removed it. He then grew two identical groups of bacteria. Those bacteria died.
Fleming then added a liquid broth that did not contain mold to the second group of bacteria. This group survived. Observation